Oil-cup.



UNITED STATES Patented January 3, 1905.

PATENT OEEIcE.

WILLIAM H. WILKINSON, OF MEDWVAY, MASSACHUSETTS, ASSIGNOR TO WVILLIAM H.WILKINSON COMPANY, OF EST MEDIVAY, MAS SAOHUSETTS, A CORPORATION OFMASSACHUSETTS.

OlL- -CUP.

SPECIFICATION forming part of Letters Patent No. 779,336, dated January3, 1905. Application filedNovember 16, 1903. Serial No. 181,283.

To all whom it may concern.-

Be it known that I, WILLIAM H. WILKINSON, a citizen of the UnitedStates, and a resident of Medway, in the county of Norfolk and State ofMassachusetts, have invented new and use-.

ful Improvements in Oil-Cups, of which the following is a specification.

My invention relates to oil-cups, and more der to force a portion of thegases up through the oil-passage and through the body of oil containedin the cup, thereby not only churning the oil and sometimes blowing itout of the cup, but also preventing or seriously interfering with itsproper feed. This result is made all the more objectionable by reason ofthe fact that the normal flow of oil from the oil-cup takes placeslowly, so that any interference with the flow has a proportionatelygreat effect on the quantity of oil admitted to the cylinder.

My invention is intended to provide an oilcup which will be free fromthe objection above referred to and will operate to' feed in a mannercapable of accurate regulation a uniform supply of oil to such acylinder without having its operation interfered with by wide variationsof pressure within the cylinder and is herein shown and described asapplied to an oil-cup of the sight-feed type, in which the rate of feedof the oil is always open to observation.

In the accompanying drawing the figure shows in central vertical sectiona sight-feed oil-cup containing my improvements in their preferred form.

Referring to the drawing, 2 indicates the oil reservoir or cup proper,which is usually made of glass and is inclosed at its top and bottom-bymetallic caps 8 and 4, suitably held together, as by a central stem 5,formed integral with the cap 4 and screwed into a central boss formed onthe inner side of the cap 8.

6 6 represent packing-rings, held between the sides of the cup 2 and thecaps 3 and 4, respectively, and 7 represents a removable screw-plugadapted to close tightly the opening through which the oil 8 isintroduced into the cup 2.

9 represents a delivery-nozzle projecting downward from the under sideof the cap 4, and 10 represents an adjustable valve having its lower endlocated in said nozzle and adapted to control the flow of oil throughthe same. The stem 11 of said valve extends upward through the stem 5,which is made hollow to receive it, and through the cap 3, and the upperend of said stem 11 is provided with an opening and closing cam 12 andan adjusting-screw 13, whereby the size of the delivery-opening throughthe nozzle 9 may be accurately regulated. The stem 11 is surrounded by aspring 14, tending to force it downward, and communication between theinterior of the nozzle 9 and the cup 2is provided by an opening 15,leading through one side of the stem 5 into the open bottom of said cup.

The parts above described are not of my invention, being substantiallythe same in construction and arrangement as the corresponding partsshown and described in United States Letters Patent N 0. 542,854,granted July 16, 1895, on the application of Theodore James.

To the under side of the cap 4 is secured a supplementary cup 16, havingat its lower end a stem 17, which is adapted to. be screwed into a holedrilled through the cylinder-wall and is provided with a passage 18,leading downward from the chamber formed by the interior of said cup 16,through which passage 18 the oil delivered by the nozzle 9 flows intothe cylinder. IVithin the supplementary cup 16 is located means fordeveloping back pressure from the passage 18, and in the presentinstance there is shown a hood 19, the lower end of which is open and islocated directly above the passage 18, so that said hood intervenesbetween said passage 18 and the nozzle 9. The hood 19 opens into and maybe supported by the lower end of a hollow tube 20, forming aback-pressure passage which extends upward through the cap 4 and the cup2 and terminates within said cup at a point above the normal level ofthe oil contained therein. The lower edge of the hood 19 is maintainedat a sufficient distance above the bottom of the cup 16 to permit theoil to flow beneath said hood into the outlet-passage 18.

In order to provide a sight-feed, a glass cylinder 21 may be fitted tothe interior of the supplementary cup 16 and packed at its ends bysuitable packing-rings 22, the walls of said cup 16 being provided withdiametrically opposite perforations 23, so that the delivery of oil fromthe nozzle 9 may be observed by looking through said perforations andglass cylinder from one side to the other.

As thus constructed the operation is as follows: Oil flows from thereservoir 2 through the opening 15 and nozzle 9 at a rate determined bythe adjustment of the valve 10 and drops from said nozzle past the lineof sight through the perforations 23 onto the top of the hood 19, whenceit flows to the bottom of the cup 16 and thence under the edge of thehood 19 and into the cylinder through the passage 18. When an explosionor other development of high pressure occurs in the cylinder, the puffof gas thereby forced outward through the passage 18 is intercepted bythe hood 19 and passes from said hood upward through the tube 20 to apoint above the level of the oil in the cup 2, where it creates amomentary pressure tending to promote the feed of the oil. Such smallportion of the gas as may pass under the bottom of the hood instantlyexpands into the comparatively large space afforded by the chamber whichcontains said hood, where its force is entirely spent, so that it cannotexert any perceptible back pressure up the nozzle 9, and hence isprevented from passing upward through the body of oil in the cup 2 andchurning the same or interfer ing with the feed of the oil in anymanner.

I am aware that oil-cups for gas-engine cylinders and the like haveheretofore been so constructed that the gas forced into the cup bypressure developed in the cylinder is caused to pass directly to a pointabove the normal level of the oil in the cup, and hence I do not broadlyclaim such an arrangement. I am not aware of any prior oil-cup, however,in which the gas so forced into the cup is intercepted by a hood in themanner above described or caused to expand into a chamber large enoughto substantially reduce the pressure of the gas, and thus render itineflective to interfere with the feed of the oil.

It will be evident that my improvements are adapted for use in oil-cupsother than sightfeed cups and that the manner in which the oil is fedand regulated may be greatly varied without departing from my invention.

I claim as my invention 1. In an oil-cup, the combination with areservoir having an outlet; of a supplemental cup or chamber to whichsaid reservoir delivers, said supplemental cup having an oil-deliverypassage; an independent back-pressure passage connecting said reservoirand cup, said back-pressu re passage terminating at its lower end withinsaid supplemental cup or chamber, and at its upper end above the normaloil-level in said reservoir; and means within said supplemental cup orchamber for deflecting back pressure to said back-pressure passage.

2. In an oil-cu p, the combination with a res ervoir having an outlet;of asupplemetal cup or chamber to which said reservoir delivers, saidsupplemental cup having an oil-delivery passage; an independentback-pressure tube leading from said supplemental cup to a point in saidreservoir above the normal level of the oil therein; and means withinsaid supplemental cup or chamber to deflect back pressure to saidback-pressure tube.

3. In an oil-cup, the combination with a res ervoirhavingan outlet; of asupplemental cup or chamber to which said reservoir delivers, saidsupplemental cup having an oil-delivery passage; and an independentback-pressure tube having a hood at its lower end covering theoil-delivery passage of said supplemental cup, and terminating at itsupper end in said reservoir at a point above the normal level of the oiltherein.

4. In an oil-cup, the combination with a res ervoir having an outlet; ofa supplemental cup or chamber to which said reservoir delivers, saidsupplemental cup having an oil-delivery passage; a hood within saidsupplemental cup over said oil-delivery passage, said hood beingslightly raised above the bottom of the cup to afford a restrictedpassage for the oil; and a tube leading from said hood to a point Withinsaid reservoir above the normal level of the oil therein, said hood andtube forming an independent back-pressure passage.

5. In an oil-cup, the combination withareservoir having an outlet; of arelatively large supplemental cup or expansion-chamber to which saidreservoir delivers, said cup having an oil-delivery passage; a hood insaid supplemental cup intervening between said reservoir-outlet and saidoil-delivery passage, said hood being slightly raised above the bottomof the cup to afford a restricted passage for the oil that flows fromthe reservoir-outlet down said intervening hood to the oil-deliverypassage; and a tube leading from the said hood and terminating at apoint above thenormal level of the oil in said reservoir.

6. In an oil-cup, the combination with a res ervoir having an outlet; ofa supplemental cup or expansion-chamber to which said reservoirdelivers, said supplemental cup having an oil-delivery passage and beingprovided with transparent walls to give a line of sight across the pathof the oil; ahood in said cup and having a flaring open mouth cappingthe oil-delivery passage and receiving the oildrip from thereservoir-outlet, said hood being slightly raised above the bottom ofthe cup to afford a restricted passage beneath the hood; and a tubeleading from said hood to a point in said reservoir above the normallevel of the oil therein.

7. In an oilcup, the combination with a reservoir 2 having an outlet 9;of means for controlling the fioW of oil from said outlet; asupplemental cup or expansion -chamber of relatively large capacity towhich said reservoir delivers; said cup having an oil-delivery passagein line With said reservoiroutlet; a flaring open-bottomed hood cappingsaid oildelivery passage and receiving the oil-drip fromsaidreservoir-outlet, said hood being slightly raised above the bottom ofthe cup to afford a restricted passage beneath the hood; and a tubecarried by said reservoir Which supports said hood at its lower end andterminates at its upper end at a point Within said reservoir above thenormal level of the oil in said reservoir.

8. In an oil-cup, the combination with a resreservoir.

.and having perforated Walls and an oil-delivery passage 18; atransparent cylinder lining said perforated cup; a flaring open-bottomedhood 'in said cup opening directlyover the oildelivery passage 18 andraised slightly above the bottom of the cup 16 to afford a restrictedpassage beneath the hood; and a tube 20 leading from said hood throughthe bottom of said reservoir and terminating at a point above the normallevel of the oil in said In testimony whereof I have hereunto subscribedmy name this 7th day of November, 1903.

WM. H. WILKINSON.

Witnesses:

E. D. CHADWIoK, JOSEPH T. BRENNAN.

